package org.eoti.xml;

import javassist.ClassPool;
import javassist.CtClass;
import javassist.NotFoundException;
import javassist.CannotCompileException;

/*
 * The MIT License
 *
 * Copyright (c) 2009 Malachi de AElfweald <malachid@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
public class NamespacePrefixMapperFactory
{
	private static final String JAXB_ENDORSED="com.sun.xml.bind.marshaller.NamespacePrefixMapper";
	private static final String JAXB_J2SE="com.sun.xml.internal.bind.marshaller.NamespacePrefixMapper";

	private static Class prefixMapperClass = null;

	public static NamespacePrefixMapper getInstance(PrefixMapper prefixMapper)
			throws NotFoundException, CannotCompileException, IllegalAccessException, InstantiationException
	{
		if(prefixMapperClass == null)
		{
			ClassPool pool = ClassPool.getDefault();
			CtClass cc = pool.get("org.eoti.xml.NamespacePrefixMapperImpl");
			try{
				Class.forName(JAXB_ENDORSED);
				cc.setSuperclass(pool.get(JAXB_ENDORSED));
			}catch(Exception e){
//			System.err.format("Unable to find %s\n", JAXB_ENDORSED);
				try{
					Class.forName(JAXB_J2SE);
					cc.setSuperclass(pool.get(JAXB_J2SE));
				}catch(Exception e2){
//				System.err.format("Unable to find %s\n", JAXB_J2SE);
				}
			}

			prefixMapperClass = cc.toClass();
		}

		NamespacePrefixMapperImpl npm = (NamespacePrefixMapperImpl)prefixMapperClass.newInstance();
		npm.setDelegate(prefixMapper);
		return npm;
	}
}
